Minecraft and Civ 5 currently taking my time. LOTRO took 650 hours of my life. Also, League of Legends.

EQ1, HoMM3 and FreeCell.

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I just reached 80 hours in Morrowind. I'm at the final part of the main quest, but I've still got to play the expansions. Done all the quests for House Redoran, Imperial Legion and Fighter's Guild, and I'm level 17, which means there's actually a lot more that I could do.

However I'm in a very time consuming college and Morrowind is the only game I've been playing for the last 2 months, I think, so I'm very eager to finish it and finally move on.

This.

Except that it's like another job where my colleagues are all women, I get paid a six figure salary, and I'm just on the verge of curing cancer through the practice of tantric sex.

Suffice to say, I quite like this series of games.

One more vote for Minecraft. The other day I just had to build a house on a floting island. And I feel like making a lava mountain.

God games in general can take up a lot of my time.

Not including mmos, the most time consuming games I've played are Dragon Warrior VII and Final Fantasy XII. Dragon Warrior VII took me well over 100 hours just to complete the main game with no strategy guide, and I spent over 100 hours on FFXII doing all the hunts up to but not including Yiazmat (never did it because I didn't feel like doing all the grinding for gear to fight it which would've taken many more hours).

These are the only two non mmo games I spent over 100 hours playing in a single playthrough.

Probably Fallout 3. I've played that for 250+ hours

The only other options would be the games I always return to, and have been for years - if not decades by now. The games I can always use if I need to kill a couple of hours... or a couple of days. They would be:

StarCraft
Diablo II
Caesar III
Heroes of Might and Magic III

Oh and every year on Christmas Day, I do a speed run of Sam & Max Hit the Road. That's gotta have clocked in a decent number of hours by now.

Hmmm...

Counter-Strike (1.6 and Source) - easily more than 700 hours
Diablo 1
Final Fantasy XII
Fallout 2
Baldur's Gate
Age of Empires
Minecraft

Civ III. 'Nuff said.

Others:
-Heroes III
-Virtua Fighter 4 evolution

Oh yea, Morrowind definitely,I've spent at least 400+ hours into it and I just started a new playthrough with the Merged Morrowind Mod Megapack which adds over 100 mods=). And the best part is that I never feel like the time I played Morrowind was wasted.

stalker series. 120 hrs across all games. that is by FAR the most i've ever put into any game/franchise

I don't buy into that school of thought. I do however believe that if you try to force them to learn something they *really* don't want to learn (such as English) then you'll piss them off enough to the point that they will despise it for life.

I've seen exactly that when I used to teach. People who wanted to learn actively learnt and improved regardless of their age. Those who didn't want to learn, didn't improve one single bit. They just ended up resenting it all and annoying everyone else.

Team Fortress 2, by far.